primary color

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pri·mar·y col·or

the three colors of the retinal cone pigments (red, green, blue) that may be combined to match any hue.
Synonym(s): simple color

primary color

Any of the three colors of light—red, green, and violet—that can be mixed to produce all the colors perceived by the human eye. Pigments that can be so mixed are red, yellow, and blue.
See also: color